[udig-devel] Different path rendering between SWTGraphics and AWTGraphic

[Mark Presling <mark@xxxxxxxxxxxx>]

Hi All.

I have come across a bug in the SWT rendering of paths when using a DrawFeatureCommand to render a MultiLineString feature.

It stems from some strange highway data that has kinks in it at various locations. This data can't be fixed (although it should) as it is managed by a government agency here in New Zealand. See here:


Under linux the path is rendered correctly (using AWTGraphics):


But under Windows it is rendered with an extra long segment in it:


This extra long segment remains and becomes more obvious as you zoom out (linux first, windows second):



Does anyone have any idea of what may be going wrong here? Is it a bug in the SWTGraphics.createPath() method or somewhere like that, or is it just an SWT bug.

I'll keep it out of Jira for now as it may be a simple fix that someone knows about. If not I'll create a Jira later.

Thanks for you help.
Mark

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